TW200725308A - Method for removing background noise from a speech signal - Google Patents

Method for removing background noise from a speech signal

Info

Publication number
TW200725308A
TW200725308A TW094146476A TW94146476A TW200725308A TW 200725308 A TW200725308 A TW 200725308A TW 094146476 A TW094146476 A TW 094146476A TW 94146476 A TW94146476 A TW 94146476A TW 200725308 A TW200725308 A TW 200725308A
Authority
TW
Taiwan
Prior art keywords
attenuation factor
background noise
speech signal
calculate
frequency band
Prior art date
Application number
TW094146476A
Other languages
Chinese (zh)
Inventor
Tai-Huei Huang
Original Assignee
Ind Tech Res Inst
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ind Tech Res Inst filed Critical Ind Tech Res Inst
Priority to TW094146476A priority Critical patent/TW200725308A/en
Priority to US11/372,315 priority patent/US20070150270A1/en
Publication of TW200725308A publication Critical patent/TW200725308A/en

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
    • G10L21/0208—Noise filtering

Landscapes

  • Engineering & Computer Science (AREA)
  • Computational Linguistics (AREA)
  • Quality & Reliability (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Noise Elimination (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

A method for removing background noise from a speech signal is provided, which comprises the following steps. First, define an attenuation factor of frequency band i, and then perform a smoothing filtering based on the attenuation factors of neighboring frequency bands to calculate a forward attenuation factor and a backward attenuation factor of frequency band i. Perform a linear combination of the forward attenuation factor and the backward attenuation factor to calculate a smooth attenuation factor of frequency band i. And then calculate a speech spectrum estimation based on the smooth attenuation factor. Finally, obtain a speech signal without background noise using inverse Fourier transform.
TW094146476A 2005-12-26 2005-12-26 Method for removing background noise from a speech signal TW200725308A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
TW094146476A TW200725308A (en) 2005-12-26 2005-12-26 Method for removing background noise from a speech signal
US11/372,315 US20070150270A1 (en) 2005-12-26 2006-03-08 Method for removing background noise in a speech signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW094146476A TW200725308A (en) 2005-12-26 2005-12-26 Method for removing background noise from a speech signal

Publications (1)

Publication Number Publication Date
TW200725308A true TW200725308A (en) 2007-07-01

Family

ID=38195029

Family Applications (1)

Application Number Title Priority Date Filing Date
TW094146476A TW200725308A (en) 2005-12-26 2005-12-26 Method for removing background noise from a speech signal

Country Status (2)

Country Link
US (1) US20070150270A1 (en)
TW (1) TW200725308A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4965891B2 (en) * 2006-04-25 2012-07-04 キヤノン株式会社 Signal processing apparatus and method
US8712769B2 (en) * 2011-12-19 2014-04-29 Continental Automotive Systems, Inc. Apparatus and method for noise removal by spectral smoothing
US11056129B2 (en) * 2017-04-06 2021-07-06 Dean Robert Gary Anderson Adaptive parametrically formulated noise systems, devices, and methods

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5400409A (en) * 1992-12-23 1995-03-21 Daimler-Benz Ag Noise-reduction method for noise-affected voice channels
SG49709A1 (en) * 1993-02-12 1998-06-15 British Telecomm Noise reduction
US5485522A (en) * 1993-09-29 1996-01-16 Ericsson Ge Mobile Communications, Inc. System for adaptively reducing noise in speech signals
US5844951A (en) * 1994-06-10 1998-12-01 Northeastern University Method and apparatus for simultaneous beamforming and equalization
US5768473A (en) * 1995-01-30 1998-06-16 Noise Cancellation Technologies, Inc. Adaptive speech filter
US5706395A (en) * 1995-04-19 1998-01-06 Texas Instruments Incorporated Adaptive weiner filtering using a dynamic suppression factor
US6088668A (en) * 1998-06-22 2000-07-11 D.S.P.C. Technologies Ltd. Noise suppressor having weighted gain smoothing
US6173258B1 (en) * 1998-09-09 2001-01-09 Sony Corporation Method for reducing noise distortions in a speech recognition system
US7224810B2 (en) * 2003-09-12 2007-05-29 Spatializer Audio Laboratories, Inc. Noise reduction system
EP1745468B1 (en) * 2004-05-14 2007-09-12 Loquendo S.p.A. Noise reduction for automatic speech recognition

Also Published As

Publication number Publication date
US20070150270A1 (en) 2007-06-28

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